<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>案例4</title>
		<style type="text/css">
			#div1{
				background-color: palevioletred;
				}
				div>input{
					margin: 10px;
					width:800px;
					height: 40px;
					background-color: #0000FF;
					}
					form{
						background-color: green;
						}
						input{
							margin: 10px;
							width:800px;
							}
		</style>
	</head>
	<body>
		<div id="div1">
			<input type="text" />
			</div>
			<form action="" method="">
				哈哈哈哈哈哈
			</form>
	</body>
</html>
